Pitch detection method
A detection method and pitch technology, applied in speech analysis, instruments, etc., can solve problems such as poor pitch detection technology, and achieve the effect of improved detection accuracy and good robustness
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[0021] Pitch detection is performed for individual notes, so the input audio signal must be divided into notes first. The music played by different instruments is collected into the computer in the form of audio signals and then processed accordingly. These collected signals are non-stationary and the consecutive notes are superimposed and not hidden from each other, so similar to speech signals, it must be First do short-term processing, that is, note segmentation. The following takes the ideal situation of the piano as an example to illustrate the composition of a single note. The composition diagram is as follows figure 1 shown.
[0022] A single note is mainly composed of four parts: the attack, the attack part, during which the amplitude envelope of the note rises rapidly; the transient part, which represents the real playing time of the player; the last is the slow decay of the instrument itself, the day and resonance part. The real start time of a played note, that i...
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